<template>
  <div>
    <div class="wrap"
         :style="{'width':systemInfo.width+'px','height':systemInfo.height+'px', 'background-color':bgcolor}">
      <div v-for="(item,index) in skeletonRectLists"
           :index='index'
           :key='item'
           class="chiaroscuro"
           :class="loading=='chiaroscuro'? 'chiaroscuro':''"
           :style="{'width':item.width+'px','height':item.height+'px','background-color':'rgba(233, 2, 233,1)','position':'absolute','left':item.left+'px','top':item.top+'px'}">
      </div>
      <div v-for="(item,index) in skeletonCircleLists"
           :index='index'
           :key='item'
           class="chiaroscuro"
           :class="loading == 'chiaroscuro' ? 'chiaroscuro' : ''"
           :style="{'width':item.width+'px','height':item.height+'px','background-color':'rgba(233, , 233,1)','border-radius':item.width+'px','position':'absolute','left':item.left+'px','top':item.top+'px'}">
      </div>
    </div>
  </div>
</template>

<script>
/* eslint-disable */
export default {
  props: {
    bgcolor: { type: String, value: '#FFF' },
    selector: { type: String, value: 'skeleton' },
    loading: { type: String, value: 'spin' },
  },

  data() {
    return {
      loadingAni: ['spin', 'chiaroscuro'],
      systemInfo: {},
      skeletonRectLists: [],
      skeletonCircleLists: [],
    };
  },

  components: {},

  methods: {
    rectHandle: function() {
      const that = this;
      //绘制不带样式的节点
      wx
        .createSelectorQuery()
        .selectAll(`.${this.selector}-rect`)
        .boundingClientRect()
        .exec(function(res) {
          that.skeletonRectLists = res[0];
        });
    },

    radiusHandle: function() {
      const that = this;
      wx
        .createSelectorQuery()
        .selectAll(`.${this.selector}-radius`)
        .boundingClientRect()
        .exec(function(res) {
          that.skeletonCircleLists = res[0];
        });
    },
  },

  onLoad: function() {
    //默认的首屏宽高，防止内容闪现
    const systemInfo = wx.getSystemInfoSync();
    (this.systemInfo = {
      width: systemInfo.windowWidth,
      height: systemInfo.windowHeight,
    }),
      (this.loading = this.loadingAni.includes(this.loading) ? this.loading : 'spin');
    const that = this;
    //绘制背景
    wx
      .createSelectorQuery()
      .selectAll(`.${this.selector}`)
      .boundingClientRect()
      .exec(function(res) {
        that.systemInfo.height = res[0][0].height + res[0][0].top || 0;
      });

    //绘制矩形
    this.rectHandle();

    //绘制圆形
    this.radiusHandle();
  },
};
/* eslint-enable */
</script>

<style scoped>
.wrap {
  position: absolute;
  left: 0;
  top: 0;
  z-index: 9998;
  overflow: hidden;
  height: 100vh !important;
  background: #fff;
}
.chiaroscuro {
  animation-duration: 1s;
  animation-fill-mode: forwards;
  animation-iteration-count: infinite;
  animation-name: placeHolderShimmer;
  animation-timing-function: linear;
  background: #f6f7f8;
  background: linear-gradient(to right, #f8f8f8 8%, #f5f5f5 18%, #f8f8f8 33%);
  background-size: 800px 104px;
  height: 40px;
  position: relative;
}
@keyframes placeHolderShimmer{
  0% {
    background-position: -468px 0
  }
  100% {
    background-position: 468px 0
  }
}
</style>